is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

1654

How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

2523

what happens to the unit particles of a solute when it dissolves on a liquid?

1710

What is density of a liquid?

585

What kinds of structural changes accompany bond-breaking and bond-forming in olefin polymerization? : Polymer Chemistry

1220

Define electrochemical series? : Electrochemistry Corrosion

551

How an electrochemical is measured? Define emf of an electrochemical cell? : Electrochemistry Corrosion

580

how to develop the icp ms method? Application of icp ms?

306

2. Two grams of Benzoic acid are dissolved in 200 ml of water and extracted with 200 ml of diethyl ether. The distribution coefficient of benzoic acid is 100, and its dissociation constant is 6.5 10-5. Calculate the distribution ratio (D) of benzoic acid at pH 2, 5, and 6. 3. Calculate D at pH 2 to 10 (1 unit apart) in the above problem, and plot D versus pH.

1754

what is the significance of control of absorbance in UV?

1778

Fresh form of water is obtained from?

624

Hi sir if any product monograph not given known impurities (may be 5 impurities) specifications then how we require to proceed for inhouse formulation?

274

in DMF having extra impurities and in api COA also having extra imp than USP or BP product then how require to proceed?

340

what is different when impergnated silica plates are used in separation of azo dyes using column chromatography?

1515

We use Potassium Dichromate solution for the calibration of UV-Visible Spectrophotometer in UV region. My question is to calibrate visible region which solution could be used in photometric accuracy

1311